Changing stations are available and used for several reasons; convenience, safety of the child, and sanitation.

and I heartily applaud the companies and venues that have added them in *MEN'S* restrooms.

But I've seen diapers changed publicly in all the situations you've described; also on buses, at concerts, and in the lobby of a movie theatre.

Because *my* first stint at diaper changing occurred a few decades ago - I didn't have much choice in where I changed the kids; there were few to no diaper changing stations available to me. And if I had to change them on a seat cushion or floor I wasn't about to do it in a restroom!